spring整合struts2

Posted 2020-10-17

1：用spring自己的监听器

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

    <!-- 配置 Spring 配置文件的名称和位置 -->
    
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    
    <!-- 启动 IOC 容器的 ServletContextListener -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- 配置 Struts2 的 Filter -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

2：加入jar包。获取spring配置文件的名称和位置用：classpath:就行了。spring自动帮我们去加载了。并放到servletContext中了。

3：写类

package com.struts.spring.beans;

public class Person {
    
    private String username;
    
    public void setUsername(String username) {
        this.username = username;
    }
    
    public void hello(){
        System.out.println("My name is " + username);
    }
    
}

package com.struts.spring.services;

public class PersonService {
    public void save(){
        System.out.println("测试service层");
    }
}

package com.struts.spring.actions;

import com.struts.spring.services.PersonService;

public class PersonAction {
    private PersonService personService;
    
    public void setPersonService(PersonService personService) {
        this.personService = personService;
    }
    public String execute(){
        System.out.println("action层");
        personService.save();
        
        return "success";
    }
}

4：配置applicationContext.xml

<bean id="person" class="com.struts.spring.beans.Person">
            <property name="username" value="陆伟"></property>
        </bean>
        <bean id="personService" class="com.struts.spring.services.PersonService"/>
        <bean id="personAction" class="com.struts.spring.actions.PersonAction" scope="prototype">
            <property name="personService" ref="personService"></property>
        </bean>

知识点：注意: 在 IOC 容器中配置 Struts2 的 Action 时, 需要配置 scope 属性, 其值必须为 prototype。会每次都重新生成一个新的对象给请求方。

5：写struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true" />

    <package name="default" namespace="/" extends="struts-default">
        
        <!--  
            Spring 整合 Struts2 时, 在 Struts2 中配置的 Spring 的 Action 的 class 需要指向 IOC 容器中该 bean 的 id
        -->
        <action name="person-save" class="personAction">
            <result>/success.jsp</result>
        </action>
        
    </package>

</struts>